usb_master: Do not rely on structs being packed
usb_master: Do not rely on structs being packed

mingw32/64 and friends have a hard time understanding packed structs. Stop
relying on the structs being packed and serialize/deserialize properly.

Signed-off-by: Alexandru Gagniuc <cf8ce030f4bdd6ce49a1b687c7c3ccfa8b34ced2@gmail.com>

mrnuke/qiprog